docs(index): OtOpcUa ClusterClient→gRPC program CLOSED — Phase 4 terminal live gate PASS 8/8 (boundary proven, terminal suite 9,333/0)
Claude-Session: https://claude.ai/code/session_014WNM4vjoVksyyBraTXSZE1
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Claude-Session: https://claude.ai/code/session_014WNM4vjoVksyyBraTXSZE1